Release 4.7 drivers/media/i2c/upd64083.c
/*
* upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
*
* 2003 by T.Adachi (tadachi@tadachi-net.com)
* 2003 by Takeru KOMORIYA <komoriya@paken.org>
* 2006 by Hans Verkuil <hverkuil@xs4all.nl>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/i2c/upd64083.h>
MODULE_DESCRIPTION("uPD64083 driver");
MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
MODULE_LICENSE("GPL");
static bool debug;
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
enum {
R00 = 0, R01, R02, R03, R04,
R05, R06, R07, R08, R09,
R0A, R0B, R0C, R0D, R0E, R0F,
R10, R11, R12, R13, R14,
R15, R16,
TOT_REGS
};
struct upd64083_state {
struct v4l2_subdev sd;
u8 mode;
u8 ext_y_adc;
u8 regs[TOT_REGS];
};
static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct upd64083_state, sd);
}
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/* Initial values when used in combination with the
NEC upd64031a ghost reduction chip. */
static u8 upd64083_init[] = {
0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */
0x36, 0xdd, 0x05, 0x56, 0x48,
0x00, 0x3a, 0xa0, 0x05, 0x08,
0x44, 0x60, 0x08, 0x52, 0xf8,
0x53, 0x60, 0x10
};
/* ------------------------------------------------------------------------ */
static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
u8 buf[2];
buf[0] = reg;
buf[1] = val;
v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
if (i2c_master_send(client, buf, 2) != 2)
v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
}
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/* ------------------------------------------------------------------------ */
#ifdef CONFIG_VIDEO_ADV_DEBUG
static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
u8 buf[7];
if (reg >= sizeof(buf))
return 0xff;
i2c_master_recv(client, buf, sizeof(buf));
return buf[reg];
}
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#endif
/* ------------------------------------------------------------------------ */
static int upd64083_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct upd64083_state *state = to_state(sd);
u8 r00, r02;
if (input > 7 || (input & 6) == 6)
return -EINVAL;
state->mode = (input & 3) << 6;
state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3;
r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
upd64083_write(sd, R00, r00);
upd64083_write(sd, R02, r02);
return 0;
}
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#ifdef CONFIG_VIDEO_ADV_DEBUG
static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
reg->val = upd64083_read(sd, reg->reg & 0xff);
reg->size = 1;
return 0;
}
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static int upd64083_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
{
upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
return 0;
}
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#endif
static int upd64083_log_status(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
u8 buf[7];
i2c_master_recv(client, buf, 7);
v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
"SA04=%02x SA05=%02x SA06=%02x\n",
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
return 0;
}
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/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops upd64083_core_ops = {
.log_status = upd64083_log_status,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = upd64083_g_register,
.s_register = upd64083_s_register,
#endif
};
static const struct v4l2_subdev_video_ops upd64083_video_ops = {
.s_routing = upd64083_s_routing,
};
static const struct v4l2_subdev_ops upd64083_ops = {
.core = &upd64083_core_ops,
.video = &upd64083_video_ops,
};
/* ------------------------------------------------------------------------ */
/* i2c implementation */
static int upd64083_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct upd64083_state *state;
struct v4l2_subdev *sd;
int i;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
if (state == NULL)
return -ENOMEM;
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
/* Initially assume that a ghost reduction chip is present */
state->mode = 0; /* YCS mode */
state->ext_y_adc = (1 << 5);
memcpy(state->regs, upd64083_init, TOT_REGS);
for (i = 0; i < TOT_REGS; i++)
upd64083_write(sd, i, state->regs[i]);
return 0;
}
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static int upd64083_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
return 0;
}
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/* ----------------------------------------------------------------------- */
static const struct i2c_device_id upd64083_id[] = {
{ "upd64083", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, upd64083_id);
static struct i2c_driver upd64083_driver = {
.driver = {
.name = "upd64083",
},
.probe = upd64083_probe,
.remove = upd64083_remove,
.id_table = upd64083_id,
};
module_i2c_driver(upd64083_driver);
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